xref: /netbsd-src/external/gpl3/gdb.old/dist/gdb/testsuite/gdb.arch/mips-octeon-bbit.c (revision 4d342c046e3288fb5a1edcd33cfec48c41c80664) 
1 typedef unsigned long long uint64_t;
2 void abort (void);
3 
4 #define BASE 0x1234567812345678ull
5 
6 #define DEF_BBIT_TAKEN(BRANCH_IF, BIT)					\
7   int bbit_is_taken_##BRANCH_IF##_##BIT (volatile uint64_t *p)		\
8   {									\
9     int ret;								\
10     asm (".set push				\n\t"			\
11 	 ".set noreorder			\n\t"			\
12 	 "bbit" #BRANCH_IF " %1, " #BIT ", 1f	\n\t"			\
13 	 "nop					\n\t"			\
14 	 "li %0, 0				\n\t"			\
15 	 "b 2f					\n\t"			\
16 	 "nop					\n\t"			\
17 	 "1:					\n\t"			\
18 	 "li %0, 1				\n\t"			\
19 	 "2:					\n\t"			\
20 	 ".set pop"							\
21 	 : "=r"(ret) : "r"(*p));					\
22     return ret;								\
23   }									\
24   volatile uint64_t taken_##BRANCH_IF##_##BIT =				\
25     BASE & (~(1ull << BIT)) | ((uint64_t) BRANCH_IF << BIT);		\
26   volatile uint64_t not_taken_##BRANCH_IF##_##BIT =			\
27     BASE & (~(1ull << BIT)) | (((uint64_t) !BRANCH_IF) << BIT);
28 
29 DEF_BBIT_TAKEN (0, 10);
30 DEF_BBIT_TAKEN (0, 36);
31 DEF_BBIT_TAKEN (1, 20);
32 DEF_BBIT_TAKEN (1, 49);
33 
34 #define EXPECT(X) if (!(X)) abort ();
35 
36 main ()
37 {
38   EXPECT (bbit_is_taken_0_10 (&taken_0_10));
39   EXPECT (!bbit_is_taken_0_10 (&not_taken_0_10));
40 
41   EXPECT (bbit_is_taken_0_36 (&taken_0_36));
42   EXPECT (!bbit_is_taken_0_36 (&not_taken_0_36));
43 
44   EXPECT (bbit_is_taken_1_20 (&taken_1_20));
45   EXPECT (!bbit_is_taken_1_20 (&not_taken_1_20));
46 
47   EXPECT (bbit_is_taken_1_49 (&taken_1_49));
48   EXPECT (!bbit_is_taken_1_49 (&not_taken_1_49));
49 }
50